Brake-shoe.



G. A. MALCOLM.

BRAKE SHOE.

APPLICATION FILED FEB. 14, 1910.

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Y A J nn/whoa Mawim w i l mooow E To all wit-omit may concern:

CHARLES A. MALCQLM, OF MINDEN, WEST VIRGINIA.

BRAKE-SHOE.

Specification of Letters Patent.

Application filed February 14, 1910. SeriaI No. 543,720.

Be it known that I, CHARLES A. MALooLM, a citizen of the United States, residing at Minden, in the county of Fayette and State of West Virginia, have invented certain new. and useful- Improvements in Brake-Shoes, of which the following is a specification, reference being had to the accompanying drawm s. I

lhis invention relates to certain new and useful improvements in brake shoes for car Wheels and has for its object to provide a device offthis character which will automatically true'the peripheries of the wheels without necessitating their removal from the trucks.

Another object is to provide a very simply constructed brake shoe which is adapted to carry an emery-block for engagement upon the periphery of the wheels, the'brake shoe proper being so formedas to prevent movement of the emery block between itself and the car wheel flange. f 4

- With these and other objects in View the invention consists of the novel features of construction and the combination and arrangement V scribed and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of my improved brake shoeengaged with the-periphery of the car wheel; Fig. 2 is a section taken on the line 22 of Fig. 1; Fig. 3 is a detail perspective view of the emery block holder; and Fig. 4: is a similar view of the emery block. Y

Referring more particularly to the drawings 5'indicates the brake shoe proper which is m the form of an arcuate plate having its ends flanged, as at 6. One of the longitudinal curved edges of the plate. 5 is also,

flanged, as shown at '7, and the inner face of the end flange is beveled or inclined, as-

' shown at 8. These beveled inner faces of the flanges 6 are adapted to be engaged by the ends of the emery block whereby the same will be retained in its enga ed position upon the periphery of the car w ieel, as will more clearly hereinafter appear. This plate 5 which forms the-body of the shoe has integrally formed therewith upon its center a boss or knuckle '9 which is adapted to be connected .or fastened to the brake mechanism, said mechanism being operated in any usual or well known mannerl The emery block 10, .as clearly shown in of parts hereinafter fully de-- Patented Oct. 11,1910.

Fig. 4, is of substantially the same curvature as the body plate 5 and isadapted'to be r'eceived between the end flanges 6 thereof.

The ends ofthis emery block are fornied with the transverse V-shaped grooves 1 1. One of the inclined Walls-11 of each of these grooves is adapted to abut againstthe'finclined inner faces of the end flanges to prevent outward movement of theem'e ry look from the inner face of the body plate 5. It will be obvious thatWhen-the brake shoe is positioned upon the periphery of the oar wheel, as shown-in Fig. 1, transverse movement of the emer 'block' will be preyented by the longitu inal flange 7 of the brake shoe and the wheel flange A of the car wheel. Thus any movement whatsoever of the emery block when the shoe is engaged with the Wheel is rendered impossible, and.

until the brake mechanism is operated to withdrawthe emery block beyond the periphery of the car Wheel flange, the emery block 10 will be frictionally held in engagement upon the car wheel. From the above, will be seen that by the use of my improved brake shoe, the periphery of the car Wheel may be kept absolutely true at all times while in use, thus eliminating the necessity of removing the wheels from the trucks when the same become worn and require trui'ng. The peripheries of the car wheels often become so far worn from contact wit-h the rails that they are grooved and the truing'of the wheels by the application of :an emery or other grinding stone thereto after removing the same from the trucks is a'very expensive and tedious process. By means of my improved brake shoe, the Wheel is automatically trued while in use and the hard labor heretofore required in the truing of car tirely dispensed with. I

1 While my improved brake shoe is more particularly adapted for use upon the wheels of minelocomotives, it will be understood.

wheels is enthe shoe from contact with the wheel and removing "the emery block so that the same may be turned end for end and replaced so that the hardened or chilled part ofithe wheel may contact with a diflere'nt part of the'emery block, or the block, if desired, may be secured in a difl'erent brake and replaced by an entirely new 'one. The

"emery blocks are, of course, cut in accordance to the diameter of the particular wheels to which they are applied. If found desirable metallic blocks may also be used.

The construction of the brake shoe is sus ceptible of various other minor modifica further utility, the same may be replaced at an -1nsi nificant cost by block rom the shoe.

is quite expensive.

In other 7 forms of brake shoes as heretofore constructed, it has been necessary to discard the entire shoe. after an extended period of use,and to replace the same by an entirely new shoe which With my device, the brake blocks-may be manufactured and sold separately from the shoe so that the usefulness of the-shoe may be indefinitely prolonged at an insignificant expense. It will be obvious that owing to the fact that the .block,can be turned end for end in the shoe, its life will thus be considerably lengthened. Having thus described theinvention what is claimed is:

1. A brake shoe comprising an arcuate body plate having a flange at each end, an emery block removably secured between said end flanges, a longitudinal flange formed on said plate extending upon one edge of the block, said emery block being adapted for engagement upon the periphery of a wheel,

whereby the same will be retained in posi-' tion'thereon between the longitudinalflange and the peripheral flange of the wheel.

'ga'gement with simply removing the of said' plate between the'end flanges, said i block extending beyond said flanges for engagement upon the periphery of a wheel, and a longitudinal flange formed on said plate extending upon one edge of the block whereby said block will be retained in enthe wheel between said flange and the peripheral flange of the wheel.

3. A brake shoe comprising a body plate having a lateral flange formed on each end, an emery block seated against the inner face of said plate and formed with an inclined portion on each of its ends, the innerfaces of the end flan es of said plate being engaged with the inclined end portions of the block, a flange formed upon one of the longitudinal edges of the plate dis osed over. one edge of the block, said block eing adapted tobe engaged with the periphery of a wheel .and held thereagainst between said longi-' tudinal flange and the wheel flange.

4. A brake shoe comprising a body plate having a lateral flange formed on each end, the inner face of each of said flanges being inclined, a' longitudinal flange formed u on one edge of said plate, an emery block is posed upon the inner face of said plate and having a V-shaped groove ineach of its ends, one of the inclined walls of said grooves being engaged upon the inner faces of said end flanges, said emery block extend ing beyond the flanges, a lon itudinal flange formed on one edge of the iody plate disposed over the edge of the emery b ock, said body plate and block being arcuate in form, the outer face of the inner block being ada ted for engagement upon the periphery of a wheel, .said block being held against accidental movement on the wheel by the lon-gt tudinal flange of the body plate and the wheel flange.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

CHARLES A. MALCOLM.

Witnesses:

L. V. Bonnrr'r, C. G. McDownLL. 

